Container blank



FIG. 1 is a front elevational view of the container blank showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, as seen from the left hand side of FIG. 1;

FIG. 4 is a side elevational view thereof, as seen from the right hand side of FIG. 1; and

FIG. 5 is a perspective view thereof. 

The ornamental design for a container blank, as shown. 